求整数的和与均值

解题思路:

注意事项:

参考代码:

total = 0
arr = list(map(int,input().split()))
if len(arr) != 1:
   for i in range(len(arr)-1):
       total += arr[i+1]
   print(total,"{:.5f}".format(total/arr[0]))
else:
   for i in range(arr[0]):
       a = int(input())
       total += a
   print(total,"{:.5f}".format(total/arr[0]))